The best open source AI tools in 2026

AI image generator that excels at legible text inside the image.

Free plan available (10 slow credits/week). Paid plans from $15/month (Plus, annual) up to $60/month (Pro). API from $0.025 per image.

AI suite to generate, edit and enhance images, video and 3D models in real time

From $9/month (Basic plan). Free plan available with 100 daily compute units. Paid plans: Basic $9, Pro $35, Max $105, Business $200, Enterprise custom.

Workflow and AI agent automation, open source and self-hostable.

Self-hosted free (Community). Cloud from €24/month (2,500 executions).

Open source image generator from Black Forest Labs.

Open models free to run locally; paid Pro versions via API.

The open source image model you can run on your own PC.

Free locally (open models). Stability's APIs and services are pay-as-you-go.

Free, unlimited AI chatbot with very capable open-weight models.

Free, unlimited chat. Pay-as-you-go API from $0.14 per million tokens.

Free AI agent for VS Code that asks permission before every change.

Free and open source (Apache 2.0). Connect your Anthropic, OpenAI, OpenRouter, Bedrock, Vertex or Azure key and pay only those tokens.

Free terminal coding agent, with Git built in.

Free and open source (Apache 2.0). You only pay for the API of the model you use, or nothing if you run it locally with Ollama.

Mistral AI's European chatbot: fast, capable and cheaper than ChatGPT.

Free plan (~25 messages/day). Pro $14.99/month, Team $24.99/month.

Moonshot AI's chatbot with leading open models for coding.

Free chat at kimi.com. Paid plans from $19/month. Pay-as-you-go API, one of the cheapest on the market.

Alibaba's free chatbot, with open-weight models.

Free web chat with no caps. Open models under Apache 2.0; Alibaba Cloud API is pay-as-you-go.

Build complete web apps and sites with AI in your browser, nothing to install

From $25/month. Free plan with 1M tokens/month (300k daily cap). Pro: 10M tokens/month with no daily cap.